Honeywell MAGICSTAT 3355 Owner's Manual
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Honeywell MAGICSTAT 3355 Owner's Manual

Weekday/weekend (5-day/ 2-day) programmable heat and/or cool low voltage (20 to 30 vac) thermostat and mounting plate
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MagicStat
/3355
®
Programmable Thermostat by Honeywell
OWNER'S GUIDE
Weekday/Weekend (5-day/ 2-day)
Programmable Heat and/or Cool
Low Voltage (20 to 30 Vac)
Thermostat and Mounting Plate
Model CT3355
1
69-1012
69-1012

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Summary of Contents for Honeywell MAGICSTAT 3355

  • Page 1 MagicStat /3355 ® Programmable Thermostat by Honeywell OWNER’S GUIDE Weekday/Weekend (5-day/ 2-day) Programmable Heat and/or Cool Low Voltage (20 to 30 Vac) Thermostat and Mounting Plate Model CT3355 69-1012 69-1012...
  • Page 2 Contact your local waste management authority for instructions regarding recycling and the proper disposal of your old thermostat. If you have questions, call Honeywell Inc. at 1-800-468-1502. Fig. 1. Typical location of a mercury switch in a thermostat.

  • Page 3: Table Of Contents

    Step 7: Mount Thermostat Mounting Plate ... 21 Step 8: Wire Thermostat Terminals ... 23 Step 9: Mount Thermostat ... 27 Step 10: Check Thermostat Operation After Programming and Installing ... 28 Step 11: Set Fan and System Switches ... 30 Troubleshooting Guide ... 32 Limited One-Year Warranty ...

  • Page 4: Step 1: Prepare For Installation

    Step 1: Prepare for Installation Check Table 1 to make sure this thermostat is compatible with your system. If not, return to the retailer. For more information, call Honeywell Customer Assistance, toll-free 1-800-468-1502. System Type Gas—Standing Pilot Gas—Electronic Ignition Gas-Fired Boilers Gas—Millivolt...
  • Page 5 CROSS-RECESSED SCREWDRIVER HAND OR POWER DRILL WITH 3/16 INCH DRILL BIT, IF NEEDED TO DRILL HOLES IN WALL MASKING TAPE, IF NEEDED TO LABEL WIRES AS DISCONNECTED FROM OLD THERMOSTAT LEVEL, IF NEEDED TO LEVEL THERMOSTAT FOR APPEARANCE M878B 69-1012...

  • Page 6: Step 2: Remove Old Thermostat

    If there is an extra wire that is not connected to your old thermostat, you will also not be connecting it to your new thermostat. Wrap wires as shown to keep them from falling back into the wall.

  • Page 7: Replacing A Clock Thermostat

    Replacing a Clock Thermostat that has C or C1 Clock Terminals? If you are replacing a Honeywell Chronotherm® Thermostat, you can find one or two wires that go to the C or C1 clock terminals on the Chronotherm® Thermostat wiring wallplate. Do not allow them to touch, or you may damage your transformer.

  • Page 8: Step 3: Install Batteries

    We recommend Energizer® batteries. Make sure the thermostat is set to the OFF position. Use a coin to remove the battery door. Install the fresh batteries as shown, making sure positive and negative terminals are oriented correctly.
  • Page 9 If you insert the new batteries within 20 to 30 seconds of removing the old ones, you do not have to reprogram the thermostat. However, if the display is blank, the batteries are dead or incorrectly installed and you must reprogram.

  • Page 10: Step 4: Program Thermostat

    After the batteries are installed, the thermostat can be easily programmed in your hand, before it is installed on the wall. If you prefer to program the thermostat after it is installed on the wall, skip to page 18, and return later to this programming section.
  • Page 11 Fill in the times and temperatures you desire for weekdays and weekends. If you decide not to program the thermostat, it will automatically control heating at 68 F (20 C), and cooling at 78 F (26 C), 24 hours a day. Also, you do not...

  • Page 12: Personal Programming Chart

    Personal Programming Chart Weekdays WAKE LEAVE RETURN SLEEP Weekends WAKE SLEEP WAKE and RETURN start times should include extra lead time based on outside temperature and furnace response time, to give your furnace a head start to heat the house. The temperatures cannot be set any higher than 88 F (31 C) or any lower than 45 F (7 C).
  • Page 13 The temperatures cannot be set any higher than 88 F (31 C) or any lower than 45 F (7 C). NOTE: If you decide not to program the thermostat, it automatically controls heating at 68 F (20 C), and cooling at 78 F (26 C), 24 hours a day.

  • Page 14: Set Current Time/Day

    This guide can be used for programming your new thermostat. NOTE: Batteries are required for operation and programming. When inserting batteries, set system switch to OFF. Remove the battery door (on the thermostat left side) using a coin at the bottom. Follow instructions on pages 8 and 9.

  • Page 15: Cooling Program

    Time Ahead Press to program WAKE time and press Back M1699A Mon-Fri. Repeat sequence for LEAVE, RETURN, and SLEEP. Weekend Press until SAT SUN, WAKE and SET appear on the display. Press Schedule Temp Warmer WAKE time and to program WAKE temperature for Sat-Sun. Repeat sequence for SLEEP.
  • Page 16 A quick guide for operating or making changes follows: NOTE: System switch must be set to Heat or Cool to perform the following. Temporarily Change temperature for current period only — press shows on display; canceling itself at the next scheduled change, or to cancel sooner press Hold a temperature indefinitely (such as when on vacation)—...
  • Page 17 Schedule Schedule Weekday Weekend until program to cancel shows; then press Schedule Schedule for length of time heat or air conditioning has been running today Program Program Questions? Call Honeywell Customer Assistance 1-800-468-1502. Clear 69-1012...

  • Page 18: Step 5: Adjust Fan Operation Switch, As Required

    A and B on the back of the thermostat. Use the heating system table shown in the illustration (page 20) as a guide. Optimize the system...
  • Page 19 (Average Fuel Utilization Efficiency) unit, adjust screw A out one turn and leave screw B in. The thermostat is set to read the tempera- ture in degrees Fahrenheit. If readings are desired in degrees Celsius, adjust screw C out one turn, as shown in illustration.
  • Page 20 THERMOSTAT BACK DISPLAY F C–IN DISPLAY C C–OUT 1 TURN FOR HIGH EFFICIENCY FURNACE (90%+ AFUE) ADJUST: SCREW A–OUT ONE TURN SCREW B–IN FUEL SWITCH – F POSITION FUEL SWITCH ADJUST SCREWS THROUGH HOLES TO SELECT OPERATION DESIRED HEATING SYSTEM WARM AIR A–IN...

  • Page 21: Step 7: Mount Thermostat Mounting Plate

    Step 7: Mount Thermostat Mounting Plate Position the mounting plate on the wall. Use a level to make sure the mounting plate is level. Use a pencil to mark the two mounting holes. Remove the mounting plate from the wall, and drill 3/16-inch holes in the wall (if drywall) as marked.
  • Page 22 Level for appearance only; thermostat functions properly even when not level. Tighten the mounting screws. LEVEL M1714A 69-1012...

  • Page 23: Step 8: Wire Thermostat Terminals

    Refer to masking tape labels you placed on the wires when you removed your old thermostat. Match the letter of your old thermostat wire with the terminal of the corresponding letter on the back of your new thermostat. Refer to illustrations on pages 25 and 26.
  • Page 24 See illustration (lower right) for wire insertion technique. Securely tighten the terminals. Plug the hole in the wall with insulation to help prevent drafts from adversely affecting the thermostat operation. INSERT STRAIGHT 5/16 in. UNDER...
  • Page 25 2-WIRE HEAT-ONLY (JUMPER INTACT) HEATING RELAY OR VALVE COIL (HOT) POWER SUPPLY. PROVIDE DISCONNECT MEANS AND OVERLOAD PROTECTION AS REQUIRED. 4-WIRE HEAT/COOL (JUMPER INTACT) JUMPER HEATING RELAY OR VALVE COIL M8793 COOLING CONTACTOR COIL RELAY POWER SUPPLY. PROVIDE DISCONNECT MEANS AND OVERLOAD PROTECTION AS REQUIRED.
  • Page 26 5-WIRE HEAT/COOL (JUMPER REMOVED) HEATING RELAY OR RELAY VALVE COIL COOLING CONTACTOR COIL (HOT) POWER SUPPLY. PROVIDE DISCONNECT MEANS AND OVERLOAD PROTECTION AS REQUIRED. 3-WIRE COOL-ONLY (JUMPER INTACT) (HOT) M8795 COOLING CONTACTOR COIL RELAY POWER SUPPLY. PROVIDE DISCONNECT MEANS AND OVERLOAD PROTECTION AS REQUIRED.

  • Page 27: Step 9: Mount Thermostat

    Step 9: Mount Thermostat NOTE: To remove the thermostat from the wall, first pull out at the bottom of the thermostat, then remove the top. ENGAGE TABS AT TOP OF THERMOSTAT AND MOUNTING PLATE. PRESS LOWER EDGE SWING OPEN COVER TO CHECK OF CASE TO LATCH.

  • Page 28: Step 10: Check Thermostat Operation After Programming And Installing

    Step 10: Check Thermostat Operation after Programming and Installing Heating Do not check heating system operation by jumpering thermostat terminals at the primary control such as the gas valve, zone valve, or oil burner control. This damages the thermostat, instead, jumper R and W wires at the thermostat.
  • Page 29 50 F (10 C). See compres- sor manufacturer instructions for further information. NOTE: When cooling setting is changed, thermostat may delay up to five minutes before turning on the air conditioner. This delay protects the compressor.

  • Page 30: Step 11: Set Fan And System Switches

    Exception: If the fan operation switch on the back of the thermostat is set to the E position (see page 20), the fan operates only with the furnace.
  • Page 31 Then set the system switch. COOL: The thermostat controls your air conditioning system. OFF: Both the heating and air conditioning systems are off. HEAT: The thermostat controls your heating system. Cool Heat Cool Heat M1707 Cool Heat M1703 69-1012...

  • Page 32: Troubleshooting Guide

    AM and PM indications are correct. Make sure the current day and time are correct. Reprogram if necessary. Check that the switch on the thermostat is set to HEAT. Check the system fuse or circuit breaker and replace or reset if necessary.
  • Page 33 If display is blank or shows bAt Lo , install fresh batteries. If temperature setting is higher than current temperature, and the display shows HEAT, contact Honeywell Customer Assistance at 1-800-468-1502. Check that the switch on the thermostat is set to COOL.
  • Page 34 If the air conditioner does not come on after the ten minutes and the display shows COOL, contact Honeywell Customer Assistance at 1-800-468-1502. If 2- or 4-wire installation, verify R-Rc jumper is installed.
  • Page 35 During recovery from setback or setup, setting and display temperatures may differ for up to 30 minutes after recovery period. Make sure the hole behind the thermostat is plugged with insulation to help prevent drafts from adversely affecting the thermostat operation.
  • Page 36 TYPICAL ENERGY SAVINGS FOR REPRESENTATIVE CITIES IN THE U.S. AND CANADA Savings for Once-A-Day 10 F (5 C) decrease Edmonton Calgary Minneapolis Halifax Vancouver St. Paul Regina Moncton Montreal Winnipeg North Bay Quebec Ottawa Toronto St. John's Savings for Twice-A-Day 10 F (5 C) decrease* Buffalo Denver...
  • Page 37 69-1012...
  • Page 38 69-1012...

  • Page 39: Limited One-Year Warranty

    Plymouth, MN 55441-4437 This warranty does not cover removal or reinstallation costs. This warranty shall not apply if it is shown by Honeywell that the defect or malfunction was caused by damage which occurred while the product was in the possession of a consumer.
  • Page 40 Honeywell Inc. Honeywell Plaza P.O. Box 524 Minneapolis, MN 55408-0524 69-1012 6-96 J.S. Printed in U.S.A. Copyright © 1996 Honeywell Inc. All Rights Reserved ® U.S. Registered Trademark Home and Building Control Honeywell Limited-Honeywell Limitée 155 Gordon Baker Road North York, Ontario...

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